Delocalized Pi Bond/Resonance
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Delocalized Pi Bond/Resonance
Would a delocalized pi bond only exist in a substance with resonance structures?
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Re: Delocalized Pi Bond/Resonance
Yes, you're correct. Because when there are only single bonds (and, therefore, only sigma bonds), there can't be resonance since all bonds are the same. Thus, resonance can only exist when a molecule has at least one double bond (for example, ), and, as we learned, a double bond consists of 1 sigma and 1 pi bonds. Therefore, any molecule that has resonance has at least 1 pi bond.
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Re: Delocalized Pi Bond/Resonance
This would be true with any bond that is more than just a single bond because a double bond and triple bond mean that a pi bond is present. You can't have a pi bond with single bonds (because those are sigma). Any structure with resonance, means there is at least one bond greater than a single bond because otherwise the structure would not have any variation.
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